| Author(s): | Gaensicke, B.T., Jordan, S., Beuermann, K., de Martino, D., Szkody, P., Marsh, T., Thorstensen, J. |
| Title: | A 150MG magnetic white dwarf in the cataclysmic variable RX J1554.2+2721 |
| Source: | To appear in: Astrophys. J. Letters |
| Year: | 2004 |
| Abstract: | We report the detection of Zeeman-split Lalpha absorption pi and sigma+ lines in the far-ultraviolet Hubble Space Telescope/Space Telescope Imaging Spectrograph spectrum of the magnetic cataclysmic variable RX J1554.2+2721. Fitting the STIS data with magnetic white dwarf model spectra, we derive a field strength of B~144MG and an effective temperature of 17000K<Teff<23000K. This measurement makes RX J1554.2+2721 only the third cataclysmic variable containing a white dwarf with a field exceeding 100MG. Similar to the other high-field polar AR UMa, RX J1554.2+2721 is often found in a state of feeble mass transfer, which suggests that a considerable number of high-field polars may still remain undiscovered. |
| Preprint issued: | |
| Remarks: |
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Letzte Änderung/Updated: 03.12.2004